Bartosz Kowalski contributed to the HabanaAI/vllm-hpu-extension repository by addressing a critical stability issue in the ModuleFusedSDPA component. He removed the initialization-time dependency on the external fusedSDPA module and instead instantiated and invoked the fsdpa kernel directly within the forward pass. This approach ensured the kernel was properly integrated into the computation graph, resolving a graph break that previously caused runtime errors on HPU hardware. Working primarily with Python and leveraging his expertise in HPU extension development and PyTorch, Bartosz improved the reliability of the forward path for SDP workloads while maintaining compatibility with existing user workflows.